气候变化领域集成服务门户(CCPortal): Edge fires drive the shape and stability of tropical forests

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DOI	10.1111/ele.12942
	Edge fires drive the shape and stability of tropical forests
	Hébert-Dufresne L.; Pellegrini A.F.A.; Bhat U.; Redner S.; Pacala S.W.; Berdahl A.M.
发表日期	2018
ISSN	1461023X
卷号	21 期号:6
英文摘要	In tropical regions, fires propagate readily in grasslands but typically consume only edges of forest patches. Thus, forest patches grow due to tree propagation and shrink by fires in surrounding grasslands. The interplay between these competing edge effects is unknown, but critical in determining the shape and stability of individual forest patches, as well the landscape-level spatial distribution and stability of forests. We analyze high-resolution remote-sensing data from protected Brazilian Cerrado areas and find that forest shapes obey a robust perimeter–area scaling relation across climatic zones. We explain this scaling by introducing a heterogeneous fire propagation model of tropical forest-grassland ecotones. Deviations from this perimeter–area relation determine the stability of individual forest patches. At a larger scale, our model predicts that the relative rates of tree growth due to propagative expansion and long-distance seed dispersal determine whether collapse of regional-scale tree cover is continuous or discontinuous as fire frequency changes. © 2018 The Authors. Ecology Letters published by CNRS and John Wiley & Sons Ltd.
英文关键词	Bistability; edge effects; fire; forest; savanna; scaling
语种	英语
scopus关键词	Brazil; fire; forest; tree; Brazil; Fires; Forests; Trees
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/121319
作者单位	Department of Computer Science and Vermont Complex Systems Center, University of Vermont, Burlington, VT 05405, United States; Santa Fe Institute, 1399 Hyde Park Road, Santa Fe, NM 87501, United States; Department of Earth System Science, Stanford University, Stanford, CA 94305, United States; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, United States; Department of Physics, Boston University, Boston, MA 02215, United States; School of Natural Sciences, University of California, Merced, Merced, CA 95343, United States; School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195, United States
推荐引用方式 GB/T 7714	Hébert-Dufresne L.,Pellegrini A.F.A.,Bhat U.,et al. Edge fires drive the shape and stability of tropical forests[J],2018,21(6).
APA	Hébert-Dufresne L.,Pellegrini A.F.A.,Bhat U.,Redner S.,Pacala S.W.,&Berdahl A.M..(2018).Edge fires drive the shape and stability of tropical forests.Ecology Letters,21(6).
MLA	Hébert-Dufresne L.,et al."Edge fires drive the shape and stability of tropical forests".Ecology Letters 21.6(2018).